Hollow auger.



I. E. ALEXANDER.

- HOLLOW AUGEH. APPLICATION FILED IAN. Il. 1916.

Patented July 3, 1917.

- LLL.

A TTDHNE Y f and without damage to other furniture.

I responding parts throughout the v severalI v posite end, a cover' ccentral opening 1s secured thereon by meansv '55 invention is shown rinI through the plaster JOHN E. ALEXANDER, or NEW YORK, N. Y.

HOLLOW AUGER.

Specication of Letters Patent.

' Patented any a, fait.

Application filed January 11, 1916. Serial No. 71,512.

To @ZZ whom t may concern.'

Be it known that I, JOHN F. ALEXANDER, a citizen of the United States,and a resident of the city of New York, in the county and State of NewYork, have invented certain new and useful Improvements in Hollow iugers, ofI which the following is a Aspecification. l

The present invention relates to improvements in hollow angers, andparticularly such an auger for making holes in plaster wall whetherceiling or side, for the reception of electric outlet boxes,

and fixture connecting devices. An object of the invention is to providesuch a device which may be operated in a quick and eilicient manner andwill make a. clean cut and properly posi- .tioned opening about a givencenter. An-

provide a device ofA this' other object is to character which will beentirely self contained and will receive and retain all material cutfrom the ceiling or side wall thereof, enabling such work tor be donewithy out dirt or dust and Without the necessity for a screen orumbrella to catch lthe debris,

expensive rugs or IVith these and other objects in view, my theaccompanying drawings, and will be hereinafter more fully described withreference-thereto and finally pointed out in the claim, 'v

In the accompanying drawings;

Figure 1 is a perspective view ofmy improved invention. y

Fig. 2 is an end view thereof.

Fig. 3 is a bottom view thereof.

Fig. 4 shows the same in engagement with the ceiling and before startingthe boxing operation.

Fig. 5 shows the auger when half way of the ceiling, and v Fig. 6 showsthe work completed, and the material cut from the ceiling contained inthe auger.-

Similar reference characters indicate corfigures of the drawings.

Y Referring to the drawings, my invention comprises a hollow cylindricalshell or body portion 10 provided at its forward edge with a series ofcutting plate'12 provided with a of screwsl.l This plate is preferablyprovided with several enlargedsegmental .openteeth 11, andat its op?ings 14 therein to diminish the weight of material. Spaced from theplate l2 there is provided within the cylindeii 10 a transverse plate 15having a central opening therein and secured within the cylinder bymeans of screws 16. A shaft 17 is mounted inthe openings of the plates12 and 15 which form bearings therefor., The innerend of the shaft isenlarged as at 18, and is provided with an interiorly threaded bore.This enlarged end is normally held in engagement with the plate 12 bymeans of a spring 19 mounted in the shaft between the under side of thesaid plate and a collar 20 secured on the shaft. The outer end of theshaft is provided with a Winged bead 21 to facilitate turning the same.v 4 A handle 22 for turning the cylinder is removably secured to theplate and is bent under the end of the shaft 17. This handle is mountedbetween guide pieces 23 and 24C formed on the said plate, and is securedin place bymeans of a screw 25 and washer 26. Then not in use the handlemay be removed to facilitate carrying.

The operation of my improved auger is as follows:

The position of the opening is determined by the built-in pipe 27, the.end of which protrudes slightly outside the plaster 28 and vThe spring19 holds the toothed edge of the cylinder in engagement with the ceilingand exerts an inward force thereon.

The

vturning of thecylinder is continued until the lathing is reached,whereupon the cake of =plaster will fall into the cylinder together withall dirt and crumbs created during the cutting operation. The openingcut is entirely smooth with no broken corners,`

amd the outlet box may be perfectly fitted therein.v My improveddevicemay be used in 'a room without' the necessity for removing or coveringexpensive rugs or other furnishings, and for this reason will proveespecially desirable when such work must be done during the occupancy ofa building.

.. I have illustrated and described a preferred and satisfactoq7 form ofmy invention but -it is obvious that changes may be made therein andthat the same may be used for various purposes, all Within the spiritand scope thereof as defined in the appended claim.

A cutting device for plaster Walls adapted to engage a fixture thereinand comprising a rod provided with means for engaging saidfiXture andWith a stop, a, rotary tubular cutter disposed on said rod and providedwith an interior abutment and at its outer end with a cutting edge, anexpansive spring disposed on said rod between said stop and 15 saidabutment; and means for turning said tubular cutter.

In testimony, that I Claim the foregoing as my invention, I have signedmy name in presence of two subscribing Witnesses.

JOHN F. ALEXANDER. Witnesses:

D. LEWIs MATTERN, F. Hose.

